https://tools.ietf.org/html/rfc7568

Points of note:

Originally posted by IETF
The Secure Sockets Layer version 3.0 (SSLv3), as specified in RFC
6101, is not sufficiently secure. This document requires that SSLv3
not be used.
Originally posted by IETF
3. Do Not Use SSL Version 3.0

SSLv3 MUST NOT be used. Negotiation of SSLv3 from any version of TLS
MUST NOT be permitted.
Originally posted by IETF
4. SSLv3 Is Comprehensively Broken